Iron-planer tool



H. DEWEY; Iron Planer Tool. I No. 227,500. Patent ed May 11, I880.

fi al/ *4 UNITED STATES I PATENT OFFICE.

HARLOW DEWEY, OF WESTFIELD, MASSACHUSETTS.

lRON-PLANER TOOL.

SPECIFICATION forming part of Letters Patent No. 227,500, dated May 11, 1880.

Application filed February 2, 1880.

To all whom it may concern:

Be it known that I, HARLOW DEWEY, of Westfield, county of Hampden, and State of Massachusetts, have invented a new and useful Improvement in Iron Planer Tools, of which the followingis a specification.

My invention relates to the cutting-tools used on iron-planers; and the objects of my invention are, first, to provide such aform and construction of a tool as will permit of its being fed against and into the piece of metal being planed much faster and to take a deeper out than is possible with ordinary tools; and, second, to provide a tool constructed so as to be useful for rough cutting, finishing, and smoothing, combining all in one tool. I attain these objects by means of the construction illustrated in the accompanying drawings, in which- Figure 1 represents a planer-head, A, having secured to it in the usual manner one of my improved tools, B, and beneath the cutting-edge of the tool 0 is shown a representation of a piece of metal, d, fastened upon the bed of a planer, 6, under the tool B, the tool being shown as canted for roughing-off the work. Fig. 1. is adiagram illustrating the position of the tool when adjusted for smoothing. Fig. 2 is a side elevation ot the lower portion of the cutting-tool B. Fig. 3 is an end elevation of the tool B.

" Similar letters refer to similar parts in several figures.

1' construct my improved tools with the lower horizontal portion, h, extending forward, the extremity of said portion h constituting the cutting-edge c, and said portion h has its rough-cutting or plowing corner curved upward, as seen in Figs. 1 and 2, and having the cutting-line of the edge inclined backward from its lowest point, x, which point :10 is the the most advanced cutting portion of the tool. From said point ac the rearward inclination of the cutting-edge gives to the tool the advantage of a shear-cut to such a degree that this tool may be forced against the face of the metal, so as to cause it to cut nearly or quite to such a depth as would be represented by the distance from the point as up to the top corner of the upturned edge of the tool.

In Fig. 1 the tool B is slightly canted, as shown, and in that position is used for roughing-ofl' work, and when so set the horizontal portion of the cutting-edge to the right of point as, Fig. l, is elevated above the roughplaned portion of the metal. After the piece has been so rough-planed the tool may be set to a proper position to bring its said horizontal portion parallel to the rough-planed face of the metal, and when so set the tool may be run over said face as a smoothing-tool, and its retreating cutting-edge to the right of said point as, Fig. 1, adapts the tool to said finishing out very advantageously, as one tool only is required for both operations.

My improved tool, as herein described and shown, possesses great advantages over the usual diamond-pointed planing-tool, for it can be set to cut very much deeper and it makes a smoother out.

What I claim as my invention is- The within-described improved planer-tool B, constructed with a horizontal portion, h,

having a cutting-edge, c, with an upwardlycurved rough-cutting corner and a smoothcutting portion, the lines of the latter receding rearwardly from the point 50, substantially as and for the purpose set forth. 4

HARLOW DEWEY. Witnesses:

(1S. PARKHURST, WM. H. CHAPIN. 

